| Present Location |
Great Central |
| County Location |
Leicestershire |
| Designed For |
BR |
| Build Location |
Derby |
| Built By |
BR |
| Diagram Number |
514 |
| Lot Number |
30380 |
| Type |
DMBS |
| First Number |
79900 |
| Later Numbers |
M79900 RDB975010 IRIS |
| Present Number |
M79900 |
| Livery |
BR multiple unit green livery |
| Gauge |
4ft 8 1/2in |
| Wheel Arrangement |
4-w bogies |
| Original Underframe |
Yes |
| Original Bogies |
Yes |
| Additional Notes |
One of only two cars, converted as two experimental single unit cars from a Derby Lightweight twin unit under construction. Used on Buckingham to Banbury service 1956 to 1961. W 1967, then to BR Research as Test Car 'Iris'. P Butterley 2000. Restored to original appearance (inside and out). Seats carry later BR moquette. To Ecclesbourne Railway at Wirksworth by 07/08. 2022: moved from Ecclesbourne Valley Railway to Great Central Railway, Loughborough. |
| External Structural Condition |
Good |
| Internal Structural Condition |
Good |
| Underframe Condition |
Good |
| External Condition |
Good |
| Internal Finish |
Good |
| Degree of External Originality |
Some replaced/reproduced material |
| Degree of Internal Originality |
Some replaced/reproduced material |
| Degree of Underframe/Running Gear Originality |
As left Departmental service |
| Degree of External Authenticity |
Very Good |
| Degree of Internal Authenticity |
Very Good |
| Degree of Underframe Authenticity |
Very Good |
| Rarity |
Unique |
| Importance |
Very Important |
| Storage |
Secure Open |
| Date Inspected |
12/02/2012 |
| Inspected By |
David Wigley |
| Date of Image |
14/04/2018 |
| Photo Taken By |
Steve West |
| At Risk |
No |
| Scrapped |
No |
| Record Last Updated |
06/03/2026 |
